2021
This problem appears in the reviewed records for this model year.
See the year recordReported years
Power Train owner reports: GMC Sierra 1500 years in the records
Owner reports are bound to model year 2021. A year on this list does not mean every car has the problem.
Years we reviewed
What to inspect
- 1Ask the inspector to test the named system and note any warning lights, noises, leaks, or stored codes.
Sources and limits
Source recordEvidence: Limited confidence
The records describe a problem worth checking before purchase.
“The 10 speed automatic transmission shakes and jumps between gears. The transmission also shakes and rumbles at cruising speeds. The diesel engine version of this truck is already recalled. My truck is a gas engine and should also be recalled. This is the same defective 10 speed transmission used in all GM vehicles and recalled in many. This vehicle needs to be recalled and fix before the wheels lock up and kill someone.”
Source recordEvidence: Limited confidence
The records describe a problem worth checking before purchase.
“transmission shuddering, harsh or delayed shifting, and erratic gear changes. The truck jerks really bad during each shift of the ten speeds. A vibration or shudder typically occurring at speeds between 25-65 mph under light throttle. Also makes a bad noise every times it’s shifting. I have no lights on the dash and the gmc app tells me everything is fine when clearly it’s not . I see there’s a recall for my year and make but for some reason my vin doesn’t fall in the category”
Source recordEvidence: Limited confidence
The records describe a problem worth checking before purchase.
“My car suffered a catastrophic engine failure, metal schards were found in the oil filter and was left out of the 2021 recall 25V274. The in service date of vehicle is March 13, 2021. The car was 83 days out of warranty when the engine failed. The truck has 47,000 miles on it. They are now trying to charge us, barter with us. They have gone from $2800 for repair, negotiated down to $100 to sign this off as a good will repair stripping us of lemon law rights and future recall remedies. Car is currently sitting at the dealership.”
Source recordEvidence: Limited confidence
The records describe a problem worth checking before purchase.
“Dashboard lit up with engine light and stated that there's no compulsion”
Source recordEvidence: Limited confidence
The records describe a problem worth checking before purchase.
“The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed, but the vehicle continued to move forward. There was no warning light illuminated. The vehicle was taken to the dealer and was diagnosed with transmission failure. The contact stated that the valve body and torque converter needed to be replaced. The dealer informed the contact that the transmission might need to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 65,561. The VIN was unavailable.”